
Rex::Template - Simple Template Engine.

This is a simple template engine for configuration files.

my $template = Rex::Template->new; print $template->parse($content, \%template_vars);

This function will check if $variable is defined. If it is defined it will return the value of $variable. If not, it will return $default_value.
You can use this function inside your templates.
ServerTokens <%= is_defined($::server_tokens, "Prod") %>